There are two Water Tanks that are required in a House:

The Underground Water tank also known as the Sump. The municipal water pipe is connected to the Sump. Hence this tank has to be close to the road as the water lines run along the road. Usually it is located below the Car Porch/Garage.

The Overhead Water Tank. The water from the sump or Well/Borewell has to be pumped into the Overhead tank in order for it to be able to flow down into the house.


An underground (sump) tank placed below the ground

Here, I have explained the Vastu Guidelines for Water Tanks. Since Vastu is a science, there is logic and reasoning behind every guideline. As an Architect, I have attempted toexplain these guidelines rationally and scientifically, so that you can decide what you want to follow and what you don’t.



The Sump should be located in the North-East corner : The Logic -Since Vastu recommends that the North-East corner of a site be left open, to allow the useful morning sunrays to enter the House,  it makes sense to have both the Water source as well as the Sump close to each other in this corner (since they are anyway under the ground and will not obstruct the light). However, if the sump is used for storing the municipal water, it makes  sense to have it in the  front, as you will need a shorter connection to the municipal water lines.
The Sump should not touch the compound walls or the building walls: The Logic -The sump should be a separate structure and should be kept a little away from the compound and building walls, to prevent any kind of dampness from seeping up the  walls.

Overhead water tanks placed on the terrace.



The Overhead water tank should be in the West or South-West of the building: The Reasoning - The South-West corner should be the heaviest, to create a balance of positive energies in the house/building.

Avoid the Overhead tank in the North-East corner of the House: The Reasoning – Though the North-East corner represents Water, avoid a tank here because the North-East has to be the lightest part of the house for a balance of positive energies.

Avoid the Overhead water tank in the South-East corner. Also, avoid the Overhead water tank in the North-West corner (if possible). However if it can be located only in the North-West, then it should be small in size, of less height, and situated at a distance of at least two feet from the North-West corner. The Scientific Reason – The basic rule in Vastu is that the building should be higher in the South and West sides and should be much lower in the North and East sides. By keeping the North and East sides much lower, constant sunlight from the North and morning sunlight from the East can reach all parts of the house, whereas  by raising the building on the South and West sides, the hot evening sun will be prevented from heating up the rest of the house.

Avoid the Overhead tank in the centre of the building (Bramhasthan) -  as  it is a load on Bramha, the supreme one. The Scientific Reason –  Structurally it is not safe to have a water tank in the middle of the house roof, unless it is a column-beam structure.

tank on stilt

The overhead tank should not directly rest on the roof slab


The Overhead tank should not directly rest on the roof slab: The Scientific Reason – In case there is a leak in the tank, the dampness can seep into the building causing structural damage and fungus growth which is not good for the health of the family.

The Overhead tank should be at least 2′ (60cm) above the topmost roof slab: The Reason -The higher the water tank is above the building, the greater will be the pressure of water, thus enabling the water to flow in full force in all the taps.

The Overhead water tank can be lined with light coloured tiles: The Logic – This will ensure cleanliness of the tank, as it is easy to maintain and there is less likelihood of growth of fungus. Moreover, the white tiles allow one to see all the dirt while cleaning.

Avoid plastic water tanks as far as possible: The Scientific Reason – We are still not sure about the health hazards of storing water in plastic containers. But today because of the convenience of plastic tanks and the inevitable leakage of concrete tanks, we are seeing more and more plastic water tanks.


Plastic water tanks are available in different sizes and capacities

In case you use plastic water tanks, use black or dark blue coloured ones:The Scientific Reason – Dark colours prevent the sun’s rays from entering the tank unlike light-coloured or transparent tanks. The sunlight that enters will encourage algal growth. (Thanks to Manoj for the correction).

Two separate Overhead water tanks are preferred – One , for storing water for drinking, cooking etc and the other, for storing water for bathrooms, gardens etc: The Logic – Nowadays, due to the shortage of piped water, it is advisable to use this water only for cooking and drinking purposes, as it is generally chlorinated, purified water. The water from an additional water source, like Well or Borewell within the site can be used for Bathrooms and Toilets as you may not be sure of the purity. Naturally the water from theses two sources should not mix and so it is better to have two separate tanks.

The Solar geyser should be above the level of the overhead water tank: to ensure proper flow of water, and all the equipment attached to the same should be installed in the South-East of the roof. The Scientific Reason – Since the South East is considered the corner representing Fire, ‘Vastu pundits’ generally recommend that all electrical and heat related appliances be placed in the South-East. That is the only scientific explanation!

The Overhead tanks are located on top of the roof and are accessed by the Staircase. Read the Vastu Guidelines for a Staircase here:

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  1. sir, My house is east facing, I have a well in EAST direction and it is covered ,we are using this covered area for entering our house from EAST Side, sir it is correct or not? ,we are planning a water sump beside the well as we dn’t have sufficient space In otherside of the house.pls guide me
    Hi Sankar,
    It is not ideal to have to cross a covered well to enter your house. But if there is no other option, then make sure the well is securely and properly covered. A sump next to it is okay.

  2. Amit Mangla says:

    As I am going to start constructing my house which is having a North-West facing plot. The directions N,E,S,W are at the corners of my house. I’m preferring to have underground water tank in the front of my house as it’ll be near to the road pipe line.
    There are 2 options:
    1: north -west.
    2: north-east
    Please suggest me the right position for it.
    My second query is: Is it fine to have 1 Bathroom-cum-Toilet in the North-East corner of the House (in the back of the house)
    Thanks & Regards,
    Amit Mangla
    Hi Amit,
    Better to have the sump in the NE corner. It is preferable not to have a toilet in the NE corner.

  3. srikanth says:

    Dear sir,
    We have a underground tank in north east corner of our north facing house. now i want to increase the want tank, if i increase the tank the will tank will come in front my entrance door east. is it recommend the water tank can be in front of the main entrance door of east?
    Thank you
    Hi Srikanth,
    It is generally not a good idea to have a tank under the entrance, mainly because there is the risk of it collapsing under the weight of the people standing on it. But nowadays these tanks are made of RCC and are strong so the risk is minimized and hence it is okay.

  4. Sudhir.t says:

    which direction is good for keeping ups and water tank inside the house and sink water flow
    Hi Sudhir,
    Better keep the ups in a well-ventilated place. Ideally the UPS and water tanks should be outside the house. But if you really have to place the water tank inside, then place it in the NE corner. The sink also can be in the N or E if it is possible. But always give practical considerations more importance and place them such that there is a good circulation space around them.

  5. Murthy says:

    Sir, I have a south facing house. The water sump is situated at NE corner. But it was extended to the back door of the house. So the door is facing the water sump . Is it good? Otherwise plz suggest me.
    Hi Murthy,
    I am assuming that the sump is underground. In such a case there is no problem.

  6. sanoj says:

    My house has west entrance. I want to place the overhead tank in that direction. Will it affect the positive energy entering through the main door due to weight of overhead tank??
    Hi Sanoj,
    An overhead water tank is ideally to be placed in the West or South Or South West. So There is nothing wrong with your proposition.

  7. veena says:

    Dear Sir
    our underground water tank is in east corner.Can we get construct our kitchen above it. Will it be ok to cover it in our kitchen. pl suggest me.
    Hi Veena,
    It’s not a good idea to build any room above an underground tank as there is the possibility of dampness, leakage when it gets full, sound as the water gushes in, and difficulty in accessing the tank for maintaining and repair. So think about it. Unless you have no other choice, avoid it.

  8. Hello,
    We have two sumps, one in northeast slightly smaller due to place constraint and other one in southeast, as per vastu we aren’t suppose to use southeast sump, we stopped using southeast sump and use it rarely during summer to store enough water, is this fine…pls suggest…
    Regards, Gayathri Hegde
    Hi Gayathri Hegde,
    Yes you can do what you are practising now as it solves the practical issues and psychologically, you feel you are following everything as per vastu.

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